@Portman C63 is a one powerful C63. It has Headers/Heads/Power Pulley/Tune and it dynoed 493 rwhp a few days ago on a pump tubne. Remeber, this C63 has heads. This is 40rwhp more than the C63 that was dynoed in this thread and still didnt hit 500

@Portman C63 is a one powerful C63. It has Headers/Heads/Power Pulley/Tune and it dynoed 493 rwhp a few days ago on a pump tubne. Remeber, this C63 has heads. This is 40rwhp more than the C63 that was dynoed in this thread and still didnt hit 500

You quoted yourself but the point is an M156 can make 500 whp NA and it can do it on pump gas well.

an M156 WILL make 500 rwhp NA, but not without a race tune/ or racing heads. IF you think otherwise please show us.

We have owned these cars for a while Joe and we've tried every tune, almost every header design and even dynoed them various times. I know what I am talking about

The M159 is based on the M156. Clearly you can have a 6.2 liter naturally aspirated V8 making over 500 whp, right? You can even do a hell of a lot more on 91 octane.

I showed you 500 whp NA on a CLK63 from back in the day. Tuning has evolved as have exhaust choices. I seriously think it not only can be done it can be exceeded. If it was me, I'd just throw in race gas and advance timing. Regardless, 500 whp in a CLK63 Black Series with bolt on mods was done YEARS AGO.

I understand people here own these cars and I hope you guys understand I probably have read more about these cars than anyone. I have studied these cars for years and years now. I follow every development and speak to tuners literally on a daily basis.

500 whp can be done. You can get more if you touch the heads or cams. You can approach 600 once you start doing that.

This discussion originated for the wrong reasons. But if you are asking me if a 6.2 liter V8 can make 500 whp on pump gas, I'm telling you it can. Domestic V8's have done this btw and they are not nearly as sophisticated as the M156.

500 whp can be done. You can get more if you touch the heads or cams. You can approach 600 once you start doing that..

600 rwhp will only be achievable on an SLS. The SLS is based on the M156, but the engine internals are completely diffrent. It has diffrent flowing heads, diffrent camshafts, diffrtent pistons, diffrent valvetrain,.....ets. This why you will see the SLS making more than 500rwhp on the dyno. It is for the same reason I am telling you that a header/tune only M156 on pump gas will not do 500rwhp

Originally Posted by Sticky

This discussion originated for the wrong reasons. But if you are asking me if a 6.2 liter V8 can make 500 whp on pump gas, I'm telling you it can. Domestic V8's have done this btw and they are not nearly as sophisticated as the M156.

Yes it can, im not denying that. But it WONT with headers/tune only. Never will. thats a fact. If it had heads/cams in addition to the headers, then yes 500 rwhp is possible

My friend are you smoke drugs? It is impossible for M156 to 500whp on normal fuel with just headers and tuning. This means car making 640 on engine. Impossible . Not even transformers movie magic. Ahhahaha

My friend are you smoke drugs? It is impossible for M156 to 500whp on normal fuel with just headers and tuning. This means car making 640 on engine. Impossible . Not even transformers movie magic. Ahhahaha

(please stop posting the evosport dynosheet, which was on a custom race tuned/header M156)

I don't have a collection of dynosheets at my disposal with a specific set of mods any member can request at any time. Once again, less sophisticated domestic V8's do over 500 whp on pump all the time at the same and lower displacement. The M156 has hit over 500 whp with bolt ons. I am not in control of how many people dyno or what mods they use.

The evidence presented here clearly shows it is achievable. It is up to others to fill in the blanks.

I don't have a collection of dynosheets at my disposal with a specific set of mods any member can request at any time. Once again, less sophisticated domestic V8's do over 500 whp on pump all the time at the same and lower displacement. The M156 has hit over 500 whp with bolt ons. I am not in control of how many people dyno or what mods they use.

The evidence presented here clearly shows it is achievable. It is up to others to fill in the blanks.

You dont quit do you?

Your going back and forth for a couple of pages now without providing proof of your argument. Sorry, but you havent showed any evidence where a header/tune only M156 on pump gas dynoing near 500rwhp. Frankly, you never will, because it NEVER and WONT happen.

We already know that the M156 is capable of reaching in excess of 500rwhp, but this is not the argument. The argument is reaching that number WITH HEADERS/TUNE only on PUMP GAS. Reaching above 500rwhp requires a race tune at the very least or racing heads or camshafts.

Yes an M156 WILL REACH 500RWHP +NA. I have seen a Header/Race tune 2010 C63 with camshafts/heads dyno 535 rwhp. I AM NOT DENYING that an M156 will hit those leves NA. Please dont flip this around when you cant provide any proof to your claims!
Again, a properly Header/tuned M156 on pump gas will dyno a maximum of 480-485 rwhp, only if it was custom tuned on the dyno. Otherwise, it will be in the range of 450-470 rwhp just like the car from Weistec that my bro Jacob posted about in this thread dynoing 445-450rwhp.

If you have proof, please show. If you like arguing for the sake of entertainment, then your wasting your time.

(Just a note for the readers , all the whp numbers I refrenced are in dynojet figures)